Drill support



Maj-ch 4,1942? F, DE CURTIS' 2,416,912

DRILL SUPPORT Fi1ed Sept. 20, 1945 Patented Mar. 4, 1947 UNITED STATESPATENT OFFICE Frank De Curtis, Queens Village; N. Y.-- YApplicationseptember 20, 1945,,Serial N0. 617,544 7 This inventionrelates to a drill support adapted to hold an ordinary hand drill in arigidly perpendicular position with respect to work which is clamped ina vise. It is common experience that drill bits usually break by reasonof bending strains put thereon when a hand drill in which a drill bit'isbeing used is moved out of line with the hole which is being bored bythe drill bit. It is difficult for the average user of a hand drill tomaintain the axis of the drill accurately in line with the hole which isbeing bored. An object of the present invention is to provide a supportor frame adapted to be mounted upon one of the jaws of a vise, the drillbeing held by the support in a rigidly vertical position and beingadjustable laterally so as to bring the tip of the drill bit over anydesired point of the work which is clamped in the vise. The support isconstructed so as to permit vertical axial movement of the drill duringthe drilling operation so that the drill bit can penetrate into thework.

It is an object of the invention to provide a support which is simple instructure and which is adapted to be used in combination with anordinary hand drill such as can be purchased in any hardware store.

Other advantageous features of the drill support embodying the inventionwill be apparent from the following description thereof and from thedrawing, of which:

Figure 1 is a perspective view of a drill support embodying theinvention;

Figure 2 is a front elevation of the same with a hand drillattachedportions of the support being broken away to show in section;

Figure 3 is a section on the line 3-3 of Figure 2;

Figure 4 is a perspective view of a part of the support;

Figure 5 is a sid elevation of a vise on which is mounted the drillsupport shown in Figure 1,

4 claims. (01. 77-13) the base of the support being shown in section ong the line 5-5 of Figure 1;

Figure 6 is a perspective view of the base of the support.

The support illustrated in the drawing comprises a generally rectangularbase I0 adapted to fit over one jaw l2 of a Visa l4. The base Itincludes a top l6 which rests on the top of the jaw l2, a front wall l8which bears against the face of the jaw l2, and end walls 20 and 22which are adjacent to the end faces of the jaw I2. A set screw 24 isthreaded through the end wall 20 of the base It) and is set up to bearagainst the adjacent end face of the vise jaw so as to clamp the basesecurely on'th jaw. The set screw is preferably of-substantial length toaccommodate vise jaws of sizes smaller than the largest size which canbe received between the end walls 20 and 22.

When thus secured, the top l6 of the base is preferably horizontal, andthe front wall I 8 of the base is vertical. As indicated in the Figure5. a work piece W can be clamped in the usual manner between the frontjaw 26 of the vise and the wall l8 of the base which bears against theface of the jaw I2.

The top [6 of the base is provided with a forwardly projecting portion28 at one end thereof and also with spaced lugs 30 and 32, the lug 32being at the opposite end from the extension 28. The extension 28 andthe lugs 30 and 32 serve to facilitate the placing of the work in thevise in a horizontal position, the under surface of the extension 28 andthe lugs 30 and 32 being in a common horizontal plane. The extension 28is provided with a rail 34 which as shown in Figures 1, 2, and 6, hasundercut edges so that the rail has a dovetailed cross section. Slidablymounted on the rail 34 is a slide 36 which can be secured in any desiredposition of adjustment along the rail by a set screw'38. Extendingupward from the slide 36 is a vertical telescoping standard consistingof a rod 49, preferably of a square cross section, on which is slidablethe leg portion 42 of a T-shaped tubular member having a cross arm 44with a tubular bore in which is slidably received a horizontal rod 46. Aset screw 48 may be provided to secure the T-shaped member in anydesired position of vertical adjustment. In like manner a set screw 50is provided to secure the rod 46 in any position of axial adjustment. Atone end of the rod 46 is a threaded stud 52 which is adapted to screwinto the threaded recess in the frame of a hand drill 54 which iscustomarily provided for the support of a handle knob. As shown inFigure 2, when the rod 46 is screwed into the threaded recess in thedrill frame, it pro- J'ects therefrom horizontally and the axis of thedrill is vertical. The square rod 46 fits slidably in the cross arm 44and is therefore non-rotat able therein but is an axially adjustableextension thereof. By adjustably moving the slide 36 on the rail 34 andadjustably moving the rod 46 in the cross arm 44, the drill bit 56 canbe brought over any desired point of the work W. The screws 38 and 59may then be set up to maintain the drill bit 56 over such point. Thescrew 48 is then backed off sufficiently to allow the T member and abase adapted to be clamped to one jaw of a vise,

a horizontal rail on said base, a slide movable along said rail, meansfor clamping said slide to said rail, a telescoping standard mounted onsaid.

slide, a non-rotatable horizontal rod mounted on said standard at itsupper end and axially adjustmounted on said slide, a T-shaped tubularmem-V ber having leg and cross-arm portions, said member telescopingsaid rod in its leg portion and having a square bore throughitscross-arm portion, a horizontal rod of square cross-section slidablyfitted in said cross-arm bore, and means on an end of said horizontalrod to make a rigid connection with a hand drill.

4. In combination with a vise adapted to hold work between the jawsthereof, a drill support comprising a base clamped to one of said jaws,a

I vertical standard mounted on said base and laterable thereon, and a,hand drill securedto one end of said rod with its axis parallel to'saidstandard.

2. A drill support comprising a base adapted to be clamped on one jaw ofa vise, a horizontal rail on said base, a slide adjustably secured tosaid rail, a vertical telescoping standard on said slide,

a horizontal sleeve at the upper end of said, standard, and a rodnon-rotatably mounted in' said sleeve and axially adjustable therein,said rcd'having means at an end thereof for securing a hand drillthereto. l

3. A drill support comprising a base adapted to be clamped on one jaw ofa vise, a horizontal rail on said base, a slide adjustably secured tosaid railya vertical rod of square cross-section ally adjustablethereon, a horizontal cross-arm mounted on said standard and verticallyadjustablethereon, an extension non-rotatably mounted on said cross-armand axially extensible, and a hand drill rigidly secured to an end ofsaid extension with its axis parallel to said standard.

FRANK DE corms. REFERENCES CITED The following references are of recordin the file of this patent:

UNITED STATES PATENTS.

Number Name Date 134,237 Amidon Dec. 24,1872 649,904 Brophy May- 22,1900766,976 Shek l Aug. 9, 1904 1,207,999 Phafi Dec. '12, 1916 1,272,108

Robb et a1 July 9, i918:

